Information
The Junos default behavior for login security provides reasonable protection from password guessing attacks, but may not be suitable for every environment.
Limit the maximum length of time in seconds available for a user to enter a username and password before the connection is terminated. The range is from 20 through 30 with a default of 120.
Solution
Configure login security for maximum amount of time a login attempt has before disconnect.
user@host# edit system login retry-options
user@host# set maximum-time 15